Angle-cock device



April 2, 1929; w, R 1,707,280

ANGLE COCK DEVICE Filed NOV. 28, 1927 I0 22 In 7 INVENTOR JOI-N W.RUSH

ATTORNEY Patented Apr. 2, 1929.

UNKTED STATE-d JOHN W. RUSH, OF W'ILKINSIBUBG, PEIilNSYLVAIEQ'lA, AESIGMOR T T I'IOUSQE AIR BRAKE COMPANY, OF WILMEEDIE'G, PI

01 PENNSYLVANIA.

\TNSYLVANIA, it. C... )Itd'l...

ANGLE-6001K DEVICE.

Application filed November This lilve fltlm'l relates to angle cock devices oi? the type employed on railway cars for controlling the ope: .in s, and closing ol the train brake pipe at each end of the car.

in order to avoid loss of control the brakes due to the unintentional or malicious closing of one or more angle cocks in a train, it has heretofore been proposed. to provide a valve controlled bypass around the cock key of the angle cock device, which will at? ford. a tree communication from one side oi the angle cook key to the other, even though the cock key may be in its closed p0 sition.

The principal object of my invention is to provide an improved angle cool: device oi the type having a bypass around the key and in which either a service or an emergency application of the brakes may be eitfooted through the bypass, with the cock key in its closed position. i i

In the accompanying drawing, the single figure is a diagrammatic sectional view ot an angle cock device embodying my inven tion.

As shown in the drawing, the angle cock device may comprise a body 1 in which is mounted a cock key 2 having; an opening 3 adapted in the open position of the key to connect the conduit 4 at the pipe side of the angle cock with the conduit 5 at the hose side, the key 2 being" provided. with an opcrating handle 6.

The body 1. carries a hollow boss 7 havin s, a piston chamber 8 containing a piston head 9 and a smaller piston chamber 10 contain ing a piston head 1.1 which is integral with the piston head 9. The piston head 11 car ries a valve seat 12 whic is adapted to on gage a seat rib 13.

hen the valve seat 12 is in engagement with the rib 13, communication is cut oil from a passage 14-, opening into the brake pipe conduit 41, to a passage 15, which opens into the hose conduit 5. A coil spring 16 acts on the piston head 9 and urges the piston. heads and the valve seat 12 toward the open position.

A valve 17, normally seated by a spring 12%, controls the venting of fluid uruler pressure from the chamber below the piston head 9 and a push button 19 is provided for operating the valve 17.

A passage 20 connects conduit 4: with piston chamber 8 and a passage 21 having a 28, 1953?. Serial No. 238,054.

restricted portion 22 connects chamber 23 which open to passage 15 with the space intermediate the piston heads 5) and 1]..

In operation, with no i'iuid. pressure in the angle cool: device, the spring: 1.6 will hold the piston S) and. the valve in the open position, as shown in the drawinn'. and with the key 2 in open position, com numication is establishml 'lfroui conduit l: through the opening 3 to conduit 5 and coup niunication is also open from conduit through passage 14: and passage to c, dint If a cool: key 2. should he accidentally or inaiicimisly closed, the piston 9 will be main-- taincd in its upper position, holding the valve 12 in open. )osition, since the fluid pressure acting on the under lface of the i ten 9 is maintained equal to that siiupphed through pas tpge 20 to the chan'iber 8 at the u e side oi? the piston, fluid under pres sure being: supplied through par ,e'e 1st to the under face of piston 11and thrmuih passage 21 to the space intermediate the piston heads 9 and 1.

Thc passe. i1 and ii are oi? suilicicnt area to permit of otl'ectinp; a reduction in pressure in the intake pipe at an emergency rate as well as at a service rate. I

If two cars are to be uncoupled and separated, the angle cocks at adjacent ends of the two cars are moved to the closed position and their the valve .17. of each alurlo cock is opened by pro on the push button 19, so that lluid under pressure is vented from the chamber intermediate the piston heads 9 and 11.

The fluid under pressure in the flexible hose connected to conduit 5 is also vented by way of passage 21. The fluid pressure in piston chamber 8 then exceeds the fluid pressure acting on the piston heads in the opposite direction, plus the pressure of spring 16, so that the piston heads move downwardly and cause the valve seat 12 to engage the seat rib 13. One of the push buttons 19 is then held depressed, while the usual hoso couplings are uncoupled, in order to ensure that the chambers intermediate the piston heads 9 and 11 are maintained at atmospheric pressure.

After the hose couplings are disconnected. the under face of the piston 11 and the chamber intermediate the piston heads are maintained at atmospheric pressure through the fle'xihle hose, the hose coupling of which is open to the atmosphere, so that the piston heads will hold the valve seat 12 in engagement with the seat rib 13.

At the end of the train, a dummy hose coupling may be employed to close the atmospheric opening at the hose coupling fthe car, so that possible leakage from thebrake pipe,past the valve seat 12, may be prevented.

While one illustrative embodiment of the invention has been described indetail, it

.is not my intention to limit its scope to that embodiment or otherwise than by the terms of the appended claims.

Having noW described my invention,

what 1, claim as'neiv and desire to secure tial piston heads for operating said valve.

2. An angle cock device having a cock key and provided with a by-pass for establishing communication from one side of the key to the other, a, valve for controlling communication through said bypass, a'piston device having diiferential piston heads for operating said valve, and a spring acting on said piston device and urging said piston device to open said valve.

3. An angle cock device having a cock key for controlling communication through a conduit and provided with a by-pass for establishing communication from the conduit at one side of the key to the conduit at' the other side, a valve for controlling communication through said loy-pass, a piston device having differential piston heads and subject to the opposing pressures in the conduit at opposite sides of the key,

and valve means manually operable to vent fluid from the space intermediate said piston heads.

d. An angle cock device having a cock key for co oiling communication through a, conduit and provided with a hy-pass tor establishing communication from the conduit at one side of the key to the conduit at the other side, a valve for controlling communication through said by-pass, a pisten device having dili j'erential piston heads and subject to the opposing pressures in the conduit at opposite sides of the key, a spring tending to move said piston device and valve to open communication through said bypass, and valve means operable man ually ior venting fluid from the space intermediate said piston heads.

5. An angle cock device having a cock key for controlling communication through a conduitand provided with a by-pass for establishing communication from the conduit at one side of the key to the conduit at the other side, a valve for controlling communication through said hy-pass, a piston device for operating said valve, comprising a piston head subject to the pressure of. fluid in the conduit at one side of the key in a direction tending to close said valve and a piston head of smaller area than the first piston head and subject on one side to the pressure of fluid in the conduit at the opposite side of the key tending to open said valve, a restricted port through which fluid is supplied to the differential area of said piston heads, and a manually operable valve for venting-fluid from the diil'erential area.

In testimony whereof I have hereunto set my hand.

JOHN T. RUSH. 

